It’s like the French Revolution. One by one, prominent men are wheeled out to the guillotine and dispatched. Of course, the present-day “deaths” are metaphorical. Garrison Keillor is still alive, just out of sight. But “Garrison Keillor,” the charming, folksy, self-deprecating Midwestern humorist, is dead. As is “Harvey Weinstein,” the brash, 1930s-style film mogul. Some of these decapitations are as swift as an ATM transaction. TV journalist Charlie Rose disappeared almost overnight.